RE: Mini coil contest

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Lau, Gary by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Gary.Lau-at-hp-dot-com>

I don't think there's been any shift in the shunt regulations.  It would be
a shame to limit the performance of these mini coils to the fully shunted
20 mA.  But I noted when I made mine, removing them all, while performing
very well, did cause the NST to quickly get hot, and we don't want folks
abusing their NST's in a destructive configuration for the sake of the
competition.  The last I heard from Dan, the rule was to leave at least 5
upper and 5 lower shunt laminations in.  Looking at the photo of my NST, it
looks like I have 8 & 9 shunts in there.  I measured my NST short circuit
current and found it to be 38mA.  I don't know that Dan actually measured
his with 5 & 5.  To be fair and to accommodate folks who use some other
brand 4kV NST (yes, in a separate competition category) where the shunt
configuration may be different, I think specifying a maximum short circuit
current for a 4kV NST is a fair and reasonable thing.

Gary Lau
MA, USA


>Original poster: "Steven Ward by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<srward16>-at-hotmail-dot-com>
>
>Ok,
>
>Here is my question, what happened to the removing 1/2 of the shunts??  I 
>was hoping that 38ma was allowable??  I dont really want to be fooling 
>around with some little 5" arcs, i want the 10" sparks.  But i suppose for 
>competition and regulations, i will try my best with the 20 ma, then have 
>more fun with the 38ma.
>
>Also, Dan, where do i find the transformers from that link you posted??  It 
>seems that they basically are listing links to manufacturers sites??  should 
>i just email them with the part number, or is there catalog in there 
>somewhere?  I guess it couldnt hurt just to email them.
>
>Steve Ward.